Flight number record

DL 2371

Delta Air Lines · Austin to Detroit

Route: AUS → DTW
Departs: 14:30
Flights: 276
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2371, check with Delta Air Lines.

DL 2371 lands a B, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 276 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 2371's record is 6 points better than the US average of 77.6%. That gap is worth roughly 57 fewer late arrivals for every thousand flights.

On time

83.3%

Arrivals under 15 minutes late, of 270 completed flights

Avg delay

88 min

Across delayed arrivals only, not all flights

Cancelled

1.45%

National rate is 1.81%

1 hour+ late

6.3%

National rate is 8.1%

These figures cover 276 flights between July 2025 and June 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When DL 2371 flies

DL 2371 flies AUS to DTW without a single fixed slot. Its most common scheduled departure was 14:30, used on 108 of 276 flights, with 14:27 (39 flights) and 14:26 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:30108 flights39.1%
Departs 14:2739 flights14.1%
Departs 14:2631 flights11.2%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 14:30 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 2371 runs 11 points better at 83.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 2371 next to AUS to DTW

Every carrier on AUS to DTW combined arrived on time 87.1% of the time across 1,336 flights, so DL 2371 is 4 points behind it. Delta flew 1,284 flights on the same city pair under all its flight numbers, including this one, and those ran 87.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 2 points.

DL 2371 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2371thin sample	276	83.3%	88 min	1.45%	B
All Delta Air Lines on AUS–DTW	1,284	87.7%	107 min	1.25%	A
All carriers on AUS–DTW	1,336	87.1%	104 min	1.27%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2371 quarter by quarter

DL 2371 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.1% on time and its weakest Oct–Dec 2025 at 75.3%, a swing of 13 points on roughly 69 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202592 flights87.9%
Oct–Dec 202577 flights75.3%
Jan–Mar 202644 flights81.4%
Apr–Jun 202663 flights88.1%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2371 did best on Wednesday at 90.5% on time and worst on Friday at 76.3%. Each day rests on about 39 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2371 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 50% of the 3,978 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
50%
Carrier
39%
National Airspace System
8%
Extreme weather
1%
Security
1%

50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,978 reported delay minutes here, that single category outweighs weather by 34 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,978 delay minutes reported on DL 2371.

Cancellations sit at 1.45% against a national 1.81%, which is ordinary. Diversions add another 0.72%.

Connections and routes

What a delay on this flight costs

6.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.

The 1,149 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on three other city pairs in the data, including ATL to BHM (24), ATL to ECP (13) and ECP to ATL (13), but none flew often enough under DL 2371 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to AUS to DTW only.

One caution: this is a thin sample. 276 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking DL 2371

For a booking, read DL 2371 as 83.3% on time with 1.45% cancelled over 276 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures